<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<input type="text" placeholder="请输入1-100之间的整数" id="i1">
<input type="button" value="猜一猜" onclick="f()">
<h1>结果：<span></span></h1>

<script>
    //生成1-100的随机整数
    let x = parseInt(Math.random()*100)+1;
    console.log(x);
    //通过选择器 获取页面中的元素对象
    let input = document.querySelector("input");
    let span = document.querySelector("span");
    let count = 0;
    function f() {
        count++;
        if (input.value>x){
            span.innerText = "猜大了！";
        }else if(input.value<x){
            span.innerText = "猜小了！";
        }else{
            span.innerText = "恭喜你第"+count+"次猜对了！";
        }
    }

</script>
</body>
</html>